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authorRalf Baechle <ralf@linux-mips.org>2006-12-12 17:14:57 +0000
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 09:27:08 -0800
commitec8c0446b6e2b67b5c8813eb517f4bf00efa99a9 (patch)
treee7c12d7c486c958a5e38888b41cfcd6a558f1aff /include/asm-arm
parentbcd022801ee514e28c32837f0b3ce18c775f1a7b (diff)
downloadop-kernel-dev-ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9.zip
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[PATCH] Optimize D-cache alias handling on fork
Virtually index, physically tagged cache architectures can get away without cache flushing when forking. This patch adds a new cache flushing function flush_cache_dup_mm(struct mm_struct *) which for the moment I've implemented to do the same thing on all architectures except on MIPS where it's a no-op. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/cacheflush.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h
index f084564..378a3a2 100644
--- a/include/asm-arm/cacheflush.h
+++ b/include/asm-arm/cacheflush.h
@@ -319,6 +319,8 @@ extern void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
unsigned long len, int write);
#endif
+#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
+
/*
* flush_cache_user_range is used when we want to ensure that the
* Harvard caches are synchronised for the user space address range.
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